Rotation-translation coupling of a double-headed Brownian motor in a traveling-wave potential

Considering a double-headed Brownian motor moving with both translational and rotational degrees of freedom, we investigate the directed transport properties of the system in a traveling-wave potential. It is found that the traveling wave provides the essential condition of the directed transport fo...

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Published in:Frontiers of physics 2021-06, Vol.16 (3), p.31500, Article 31500
Main Authors: Wu, Wei-Xia, Li, Chen-Pu, Song, Yan-Li, Han, Ying-Rong, Zheng, Zhi-Gang
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Atomic
Brownian motor
Condensed Matter Physics
current reversal
Electrons
Molecular
Noise
Noise intensity
Optical and Plasma Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Proteins
Research Article
Resonance
rotation-translation coupling
Science
Stochastic resonance
Transport properties
Traveling waves
traveling-wave potential
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Li, Chen-Pu
Song, Yan-Li
Han, Ying-Rong
Zheng, Zhi-Gang
description Considering a double-headed Brownian motor moving with both translational and rotational degrees of freedom, we investigate the directed transport properties of the system in a traveling-wave potential. It is found that the traveling wave provides the essential condition of the directed transport for the system, and at an appropriate angular frequency, the positive current can be optimized. A general current reversal appears by modulating the angular frequency of the traveling wave, noise intensity, external driving force and the rod length. By transforming the dynamical equation in traveling-wave potential into that in a tilted potential, the mechanism of current reversal is analyzed. For both cases of Gaussian and Lévy noises, the currents show similar dependence on the parameters. Moreover, the current in the tilted potential shows a typical stochastic resonance effect. The external driving force has also a resonance-like effect on the current in the tilted potential. But the current in the traveling-wave potential exhibits the reverse behaviors of that in the tilted potential. Besides, the currents obviously depend on the stability index of the Lévy noise under certain conditions.
doi_str_mv 10.1007/s11467-021-1057-x
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subjects Astronomy
Astrophysics and Cosmology
Atomic
Brownian motor
Condensed Matter Physics
current reversal
Electrons
Molecular
Noise
Noise intensity
Optical and Plasma Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Proteins
Research Article
Resonance
rotation-translation coupling
Science
Stochastic resonance
Transport properties
Traveling waves
traveling-wave potential
title Rotation-translation coupling of a double-headed Brownian motor in a traveling-wave potential
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